<form class="group grey-box login-form" method="post">
    <h5> Login: </h5> <br>
    <label><span>Username:</span>
        <input type="text" name="username" />
    </label>
    
    <label><span>Password:</span>
        <input type="password" name="password" />
    </label>
    
    <div class="right group">
    <input type="hidden" name="action" value="login" />
    <input class="right primary-button skin-gradient" type="submit" name="login" value="Login" />
    </div>
</form>